Improvement in mechanical movements



UNITED STATES PATENT OFFICE.

JOHN W. MULLDTS, OF LONDON, KENTUCKY.

IMPROVEMENT IN MECHANICAL MOVEMENTS.

Specification forming part of Letters Patent No. 203,758, dated May 14,1878 application filed February 11, 1878. v

To all whom it may concern:

Be it known that I, JOHN W. MULLINs, of London, in the county of Laurel,and in the State of Kentucky, have invented certain new and usefulImprovements in Mechanical Mo vements; and do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon, making a part of this specification.

The nature of my invention consists in the 7 construction andarrangement of a mechanical movement, as will be hereinafter more fullyset forth.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in which-Figure 1 is a side elevation of my mechanical movement, showing the sameapplied to I a sewing-machine. Fig. 2 shows a modification of themovement.

A represents the frame of a sewing-machine, from which projects a stud,a, and upon this stud is placed a driving-wheel, B. This wheel may berevolved by means of a crank turned by hand, or by a treadle, or by anyother suitable means. The rim of the wheel B projects inward beyond thespokes, and this portion of the rim forms a series of mounds, b, anddepressions b, alternating as shown; or, in other words, the rim isformed on the inside with a series of long corrugations, which should,of course, be of uneven number, so that the center of one mound, b, willbe diametrically opposite the center of one depression, I).

G is a rod or bar, having an enlargement at d, which is slottedlongitudinally and passes over the stud a-that is to say, the studa ispassed through the slot in the enlargement d of the rod 0. On this rodor bar, at suitable points, are secured studs 6 e, to receive twofrictionrollers, h h, which are arranged to bear against the rim of theWheel B. In the drawing I have shown the upper end of this rod or bar 0pivoted to a pivoted curved lever, D, for operating a sewing-machine;but it may be applied to any kind'of machinery.

By rotating the wheel B the bar or rod 0 obtains a reciprocating motion,which can be imparted directly to the machinery to be operated withoutthe intervention ofeogs, pulleys, belts, or other devices.

The number of strokes of the bar or rod 0 depends upon the number ofmounds and depressions in the wheel B.

Instead of the rod or bar 0 passing over the stud a, said bar may bepivoted and provided with side arms 0 O, as shown in Fig. 2. The rollersh h will then be suitably mounted in the extreme ends of said arms.

I disclaim the employment of a solid wheel having its peripherycorrugated, in combination with two yokes, two sets of connectingrods,two rollers, and apitman, as such is not my invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

The wheel B, having its rim on the inside formed with gradual andalternate mounds and depressions b and b, and the single rod or bar 0,provided with friction-rollers h h, as set forth.

Intestimony that I claim the foregoing I have hereunto set my handthis3d day of January, 1878.

JOHN WESLEY MULLINS.

Witnesses:

THOMAS J. BALES, JOHN B. LUCAS.

